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ADV7189B

Rev. B | Page 56 of 104

NTSC CCAP Data

Half-byte output mode is selected by setting CDECAD = 0; the

full-byte mode is enabled by CDECAD = 1. See the

232HGDECAD

Gemstar Decode Ancillary Data Format,

Address 0x4C[0] section. The data packet formats are shown in

233HTable 70 and 234HTable 71.

NTSC closed-caption data is sliced on line 21d on even and odd

fields. The corresponding enable bit has to be set high. See the

section and the

235HGDECOL[15:0] Gemstar Decoding Odd Lines,

Address 0x4A[7:0]; Address 0x4B[7:0]section.

PAL C C AP Data

Half-byte output mode is selected by setting CDECAD = 0;

full-byte output mode is selected by setting CDECAD = 1.

See the

236HGDECAD Gemstar Decode Ancillary Data Format,

Address 0x4C[0] section.

237HTable 72 and 238HTable 73 list the bytes

of the data packet.

PAL closed-caption data is sliced from Lines 22 and 335. The

corresponding enable bits have to be set.

See the

239HGDECEL[15:0] Gemstar Decoding Even Lines,

Address 0x48[7:0]; Address 0x49[7:0] section and the

240HGDECOL[15:0] Gemstar Decoding Odd Lines,

Address 0x4A[7:0]; Address 0x4B[7:0]section.

Table 72. PAL CCAP Data, Half-Byte Mode

Byte D[9] D[8] D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] Description

0 0 0 0 0 0 0 0 0 0 0 Fixed preamble

1 1 1 1 1 1 1 1 1 1 1 Fixed preamble

2 1 1 1 1 1 1 1 1 1 1 Fixed preamble

3 0 1 0 1 0 0 0 0 0 0 DID

4 !EP EP EF

0 1 0 1 0

0 0 SDID

5 !EP EP 0 0 0 0

0 1

0 0 Data count

6 !EP EP 0 0 CCAP Word1[7:4] 0 0 User data-words

7 !EP EP 0 0 CCAP Word1[3:0] 0 0 User data-words

8 !EP EP 0 0 CCAP Word2[7:4] 0 0 User data-words

9 !EP EP 0 0 CCAP Word2[3:0] 0 0 User data-words

10 !CS[8] CS[8] CS[7] CS[6] CS[5] CS[4] CS[3] CS[2] CS[1] CS[0] Checksum

Table 73. PAL CCAP Data, Full-Byte Mode